The population boom in Dallas, as with many other sunbelt metros, is well documented. But that comes with an interesting demographic quirk: People here tend not to have lived in their current residences for all that long.

The median resident in the Dallas-Plano-Irving and Fort Worth-Arlington metro areas moved to where they're living now in 2006, according to a recent study from online real estate site Trulia. This includes owners and renters of homes, apartments, condos and so on.

That number aligns with the median move-in year (2006) for suburban zip codes nationwide, the study says, which makes sense given the influx of new residents and construction in D-FW's suburbs.

Frisco, for example, was the nation's fastest growing city last year. In Frisco zip codes 75034 and 75035, the median resident moved into their current place in 2010 and 2009. Renters in those zip codes tend to have moved in during 2012-2013.

Generally speaking, renters in the study got the keys to their homes and apartments more recently than owners, which makes sense given the inherent transience of renting.

Downtown and north Dallas residents are often 2012 or 2013 arrivals as well.

Nationwide, urban areas had the most recent median move-in — 2007, according to the study.

Nationally, established cities on the eastern seaboard and midwest have the highest proportion of long-term residents. In the Bronx's 10475 zip code, the median household, even though the area is majority renter, has been in the same unit since 2000.

By and large, metros west of the 95th meridian line — a line of longitude that roughly follows the Mississippi River — have higher proportions of recent movers-in than those to the east. Notable exceptions include high growth cities of Atlanta, Nashville and those along the Florida coast.

There are longer tenured residents in D-FW. But they tend to be clustered in far flung exurbs and rural regions where growth has been less robust and renters are few and far between. The median person in the far-southwestern 76070 zip code, which includes the tiny town of Nemo, moved to their residence in 1997.